Electrical fuse.



H. W. YOUNG.

ELECTRICAL FUSE. APPLICATION mm JULY 8, 1914.

1,167,965. Patented Jan. 11,1916.

' cation.

' UNITED STATES PATENT. oFF'mE.

HARRY W. YOUNG, OF CHICAGO, ILLINOIS.

ELECTRICAL FUSE.

To all whom it may) concern:

Be it known that I, HARRY. W. Yonno, a citizen of the United States, and a resident -of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Electrical Fuses, of which the following is a spec1- My invention relates to improvements in electrical fuses and has for its ob ect .the

. provision of an. improved fuse of this char-- acter provided with special provision for extinguishing the arc and preventing dam-' ,age. therefrom and also for readily I indicat ing the capacity thereof.

The invention consists 1n the combinationsand arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawlngforming a part of this specification and in which, Figure 1 is a side view of a fuse embodymg my invention, Fig. 2, a longitudinal A plate 8 is imprisoned between cap 7 and.

the corresponding end of tube 6 and carries a contact blade 9 extending through a slot in said cap. and adapted to serve as a means for effecting electrical connection with the corresponding end of the fuse member. Plate'8 carries aninwardly extending guard pin-10 and a securing screw 11 is. swiveled in cap '1 and extends inwardly into said casing, said screw having a comparatively long length and the pin '10 extending inwardly slightly beyond the inner end thereof. A removable fuse cartridge is ar ranged within casing 6, said fuse cartridge consisting of a tube 12 of paper or other suitable insulating material and closedat one end by means of a plate 13, also of paper. or similar insulating material. A fusible strip 14 is arranged within casing 12 and 1 has one end 15 bent into U-shape to embrace a radially extending lip 16 ona threaded Specification of Letters Patent.

construction as Patented Jan. 111, 1916.

Application filed July 8,1914. Serial No. 849,675. i

sleeve 17 said threaded sleeve projecting into a correspondingly shaped opening in plate 13. Sleeve 17 is positioned to receive screw 11 and an opening 18 is provided in plate 13 to pass over pin 10 to permit of screwll entering said sleeve, said screw' and sleeve constituting means for effecting electrical connection with the corresponding end of fusible member 14. The sleeve 17 is made of comparatively great lc'ngth to correspond with" screw 11, such construction besides constituting a secure connection for the fusible member, also affords a connection having great capacity for heat conductivity, thus tending to extinguish quickly the are formed by the fusing of the fusible member and also tending to prevent injury to the surrounding members. The other end of fusible member 14 .is secured to a head member 19, said head member 19 being bent, as shown, into substantially T-form having the stem portion extending through the correspending end 20 of the cartridge and then separated into branches 21 extending outwardly and'then rearwardly over the corresponding end portions of-the outer casing 6: Each of the branches 21 is.provided with a screw receiving opening 22 registering with a corresponding threaded opening in a metallic band 23 surrounding the corresponding end of outer casing 6 and a corresponding opening in said casing 6. The

ends of the branches 21 are extended well beyond band 23. and are stamped on ,their outer sides with the capacity, in amperes, of

the fusible member, as indicated in Figs. 1 and 4. The corresponding end of c'asingfi is closed by a metallic plate 24 having side lugs or ears 25 which extend through .corresponding notches 26 in casing 6 and rest over the branches 21, as shown, said lugs being provided with screw receiving open-, ings 27 adapted to receive fastening screws 28' carried by spring vmemloers29 on plate 24. Plate 24 is also provided with a knife blade 30 to facilitate making electrical connection with the corresponding end of the fusible member 14. This construction constitutes a simple and efficient construction for effecting connection withthe fusible member and at the same time constitutes a simple and efficient construction for indicating the current-carrying capacity of the fusible members. While I have illustrated and described the preferred form of construction for carrying lot my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications .as come within the scope of the appended. claims. v

Havmgdescribcd my invention what I claim as new and desire to secure by Letters Patent is: 1 LA fuse comprlsmgan outer casmg of insulating material; a metallic cap for one end of said casing; a comparatively long screw swiveled in said cap and extending intosa d casing; an inner removable carelectrical connection with the other end ofsaid fusible member, substantially as described.

' 2. A fuse comprising an outer casing of v and fitting a correspondinginsulating material; a screw projecting into one end of said casing; an inner removable cartridge; a fusible member in said cartridge having one end formed into a substantially U-shaped channel; a metallic sleeve secured to one end of said fusible member and arranged to receive said screw, said sleeve being provided with a locking lip interlocking with said channel and fitting a corresponding opening in the cartridge end; and means in the other end of said casing for elfe'cting'electrical connection with the other end of said fusible member, substantially as described.

3. A fusible member having one end formedinto a substantially U-shaped channel; and a threaded sleeve having a locking lip interlocking with said channel, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

I HARRY W. YOUNG.

WVitnesses:

JOSIIUA R. H; POITTS, IIELEN F. LILLIs.

Oopie: of this patent may be obtained for five cents each, by addressing-the Commissioner of Patents, WashingtomD. 0,. 

